/*
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package session02.language;

/**
 *
 * @author macbookpro
 */
public class WapperTest {
    public static void main(String[] args) {
        String str = "12";
        System.out.println(str + 7);
        
        System.out.println(Integer.parseInt(str)+7);
        
        System.out.println(Integer.parseInt("12a"));
    }
}